+ Landing zone has an empty car (four seats [fits just fine]) ready to be occupied.

+ An HVT to take down

+ 1 Exfil chopper

Okay, so everything is set up pretty nicely. The team lands at the LZ and disembarks; chopper returns to base and the second Waypoint I put for the team is for them to enter the vehicle which I've properly named "insertionVehicle"

So on the "On Act." of the Waypoint I wrote:

tm1 MoveInDriver insertionVehicle

Probem is that the Driver seat won't be occupied by the Team leader but by one of the squad members.

Well, I've also seen a post where it says that you can put

tm1 GetInDriver insertionVehicle

I tried it, but it gave me an error saying "Expect Nothing".

So the question: How do I make a specific unit board a specific seat and how (if it is trigger activated or Waypoint activated)?

syntax [groupname] in brackets may be wrong, copy a group order if you can find one or do them all individually
getIndriver is wrong, you can orderGetIn I think, but i think the above should work as he is already assigned and shouldn't be replaced - besides, he doesn't need to be driver just to get the group to follow a waypoint, just use driver (insertionVehicle) and move him - if that fails, order the leader to move anyway, he should stay in the vehicle and order ther driver to move